Method of producing paper matrices for half-tone stereotyping.



NNNNNNNNN N. METHOD OF PRODUCING PAPER MATRICES FOR HALF-T NNNNNNNNNNNNNN G.

APPLICATION FILE D N 0 V 9 1 9 1 1.

1, 108,677, Patented Aug. 25, 1914.

UNITED sTATEs PATENT oEEioE,

NIELS IBENDIXEN, 0E COPENHAGEN, DENMARK.

METHOD OF PRODUCING PAPER MATRICES FOR HALF-TONE STEREOTYPIN'G',

To all whom it may concern:

Be it known that I, NIELs BENDIXEN, subject of the King of Denmark, residing at Studiestreede 28, Copenhagen, Denmark, have invented new and useful Improvements in Methods of Producing Paper Matrices for Half-Tone Stereotyping, of which the following is a specification.

The invention relates to a method of pro-i ducing paste-covered paper matrices for the stereotyping of half-tone printing blocks,

and the object of the invention is to make it possible toproduce such matrices very quickly and to render them impervious to making the blocks. At the present state of the art of illustration, when an event is to be illustrated in the worlds press this is done by mailing, from the locality concerned, photographs of the event, often by the hundred, to the illustrated press all over the World. At every place where these photo graphs are received etchings, and often quite expensive ones, are produced therefrom, and the total cost of production of these many etchings run into considerable sums, and besides much time is wasted by the exactly identical process, namely the etching, being repeated at so many different places.

The present invention has for its object partly to save money, partly to save time for the illustrated press, and it is carried into effect in the following manner 1] In the accompanying drawing illustrating the different steps in carrying out this method, Figure 1 shows a section through the etching a,"Fig. 2 a similar view to Fig. 1} with a coat of paste [2 applied; Fig. 3 shows the next step, when the paper fiong c has been laid upon the paste coated etching of Fig. 2; and Fig. l shows the completed paper matrix removed from the etching.

From a photograph an etching a is made. This is coated by an especially prepared paste Z) constituting a part of this invention, By means of another special paste, being also an integral part of the invention, a

Specification of Letters Patent.

Patented Aug. 25, 1914;.

Application filed November 9, 1911. Serial N 0. 659,415.

moist matrix backing c is made, 2'. 6. one pasted together of layers of tissue paper and so-called plate paper, that means the kind of paper used in copper plate printing; this matrix is placed on top of the coated etching, covered by blotting paper and placed in a heated drying press. The coating on the etching will then loosen itself from the etching and adhere to the paper matrix, transferring to the paper all the details of the etching. In this manner a paper flong is procured, which is flexible and adapted to be sent by mail and wherein, immediately after its production, one or several castings may be made, using a suitable metal alloy, the so called stereotype metal.

Such paper matrices containing the details of the etching may be produced in very few minutes, owing to the special composit1on of the matrix paste, and very much quicker than a photograph might be pro duced', and as an unlimited number of matrices may be produced from the same one etching, and the receivers of these, at a very insignificant cost may stereotype a printing block on the paper matrix received, and may, after having used the block for printing, remelt it and use it for a new block, this invention means, in practice, a very extraordinary saving of time and money, because only one etching of the event has to be made, because the paper matrices may be produced at a minimum cost, because the receiver of the paper matrix avoids the expense of producing an etching, and finally because the receiver of the paper matrix may at once cast a block therein and has not to waste time by producing an etching.

The special features of the invention are the following: For coating the etching a paste is used containing a fatty substance as well as a grease absorbing substance. The fatty substance is contained in the paste in shape of an especially fine emulsion of for instance a paraffin, and is produced by preparing a strong solution of glue, preferably fish glue wherein the paraffin is melted. In preparing this first paste, I preferably use a filling and adhesive substance, an emulsion of a fatty substance, such as an emulsion of parafiin in fish glue and a grease absorbing substance, such as pipe clay. The glue has the peculiar property to dissolve the parafiin into a microscopically fine state without depositing it again, which cannot be attained in any other of the known manners, for-instance not by dissolvlng the para'flin in a solvent and mixing the solution with the other solid components of the paste. A paste prepared in this manner would prove unfit for use. To the fatty solution of glue prepared, a grease absorbing substance is added, for instance a clayey substance such as pipe-clay. When this paste is spread onthe etching, the matrix material is placed thereon, as mentioned above.

The distinguishing feature of this matrix is that it possesses an extraordinary power to dry quickly, absorbing-at the same time the fatty substance of the paste. It has been tried to produce quickly drying paper matrices by means of easily volatile fluids, for

instance alcohol, but this method has had the draw-back that the alcohol of the damp matrix evaporated too soon, and consequently the matrix became dry, before it entered into the drying press whereby it lost its binding power and instead of forming a solid coherent mass it was loose and liable to beseparated sheet for sheet. This'drawback is avoided, according to the present invention, by binding the alcohol by the ad- :dition of soap, which will retain the alcohol,

even at the temperature to be found in a heated stereotype room, but it will nevertheless allow a quick evaporation of the alcohol, as soon as the etching and the matrix are brought into the heated drying press. The second paste is therefore preferably prepared from an alcoholic solution of soap,

continued drying the blotting paper of the matrix as well as its clayey substance will continue this absorption of grease, the result being that the finished picture matrix, throughout its mass, will become fatty, the amount of grease decreasing toward the side which has been nearest to the etching. This is on account of the highly absorbing quality of the porous paper in the flong, which, during the heating absorbs the grease, so that very little of the grease will remain in the paste coating of the matrix. In this manner it has been attained to produce amatrix impervious to the atmospheric humidity and still admitting excellent casting to be made thereon.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that What I claim is 1. A method of producing a matrix for stereotyping consisting in" first applying to an etching a coatlng suitable for produclng a relief surface; secondly 1n pasting to gether several layers of paper to forma pad by means of a paste contalning saponaceous, absorbing and adhesive substances; thirdly in placing said pad While damp on said coating; fourthly in pressing said pad upon said coating and lastly in drying the thus produced matrix and subsequently detaching the completed matrix from the etching.

2. A method of producing a paper matrix for stereotyping consisting in first coating :1 suitable etching with a hesive fatty and absorblng substances; secondly in pasting together several layers of paper to form a pad by means of a paste containing saponaceous, absorbing and adhesive substances; thirdly in placing 'said 85 pad while damp on said coating; fourthly in pressing said pad upon saidcoatmg and aste containing adlastly in drying the thus produced matrix and subsequently detaching the completed matrix from the etching. I

3. A method of producing a paper matrix for stereotyping consisting in first coating a suitable etching with, a paste containing at hesive, fatty and absorbing substances; secondly in pasting together several layers of paper to form a pad by meansof a paste containing saponaceous, absorbing and adhesive substances, saldpad being composed of alternate sheets of tissue paper and'plate paper; thirdly in placin said pad while damp on said coating; fourthly in pressing said pad upon said coatingv and lastly in drying the thus produced matrix and subsequently detaching the completed ma trix from the etching. v

4. A method of'producinga paper matrix for stereotyping consisting in first coating a suitable etching with-a paste-containing adhesive, fatty and absorbing substances; said substances comprising an emulsion of paraf- 1 fin in fish glue and pipe clay; secondly in pasting together several layers of paper to form a pad by means of a paste containing saponaceous absorbing and adhesive substances; thirdlyin placing said pad while damp on said coating; fourthly in pressing said pad upon said coating and lastly in drying the thus produced matrix and subsequently in detaching the completed matrix from the etching. v

5. A method of producing a paper matrix for stereotyping consisting in first coating a suitable etching with a paste containing adhesive, fatty and absorbing substances; secondly in pasting together several layers of paper to form a pad by means of a paste containing saponaceous, absorbing and adhesive substances, said substances of'the paste being respectively an alcoholic solution of soap, pipe-clay and an adhesive; 5"

thirdly in placing said pad While damp on said coating; fourthly in pressing said pad upon said coating and lastly in drying the thus produced matrix and subsequently detaching the completed matrix from the etchm 6. A method of producing a paper matrix for stereotyping consisting in first coatinga suitable etching With a paste containing adhesive, fatty and absorbing substances, said substances comprising an emulsion of paraf-- fin in fish glue and pipe clay; secondly in pasting together several layers of paper to form a pad by means of paste containing saponaceous, absorbing and adhesive substances, said pad being composed of alternate sheets of tissue paper and plate-paper,

together and lastly in drying the thus produced matrix and subsequently detaching the completed matrix from the etching.

The foregoing specification signed at Copenhagen this 21st day of September, 1911. v

NIELS BENDIXEN.

In presence of two Witnesses- JULIUs LEHMANN, ORR GmRsINe.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0." 

